Filter



J. TOLAND.

FILTER.

(No Model.)

v .UNITED STATES PATENT Fries.

JOHN TOLAND, OF BOSTON, MASSACHUSFTTS.

FILTER.

SPECIFICATION forming part of Letters-Patent No. 291,550, dated January 8, 1884.

Application filed August 1, 1883. (No model.)

l'o LZZ whom it may concern:

Be it known that I, JOHN TOLAND, of Boston, in the county of Suffolk, ofthe Commonwealth of Massachusetts, have invented a new and useful Improvement in Filters; and I do hereby declare the same to be described in the following specification and represented in the accompanying drawings, of which- Figure 1 is a longitudinal section, Fig. 2 a transverse section, and Fig. 3 an end elevation, of alter embodying my invention, the nature of which is defined in the claim hereinafter presented. Fig. 4 is a transverse section on the line w' y of Fig. 1. Fig. 5 is a transverse section on `line m2 z2 of Fig. 1.

The improvement relates to the kind of lter described and represented in the United States Patent No. 248,897, granted November 1, 1881, to me. l In the place of chambered two-way cocks, as employed in such ilter. I now use two valvesfwhich have their spindles l extended through stuffing-boxes, and I have from the case.

with each valve a chamber provided with two valve seats, which open into passages arranged on opposite sides of each valve-chamber, and which communicate with the interior of the case of the filter. These valves, chambers, passages, and seats are intwo separate chests, each of which is provided with one valv'e-chamber, two valve-seats, and two passages leading therefrom, all being substantially as hereinafter described.

In such drawings, A denotes the lter-case, which has within it four passages, a fu and a t. Vithin the case, and near each end of it, is a partition, as shown at a and a', it being of woven wire, suitably secured in place between two spiders, b c, by means of screws cZ, going through the said spiders and partition and screwed into ears c, projecting inward The said case between the woven-wire partition is to be charged or filled with a suitable ltering medium, matter, or matters-such as bone charcoal, for instance. The cylindrical case A is open at its opposite ends, and has removable heads f j", adapted to such ends, and fastened in place therein by screws y. Furthermore, the case Ahas on opposite sides of ittwo projections, D, having dat seats h to receive and support two valve-chests,

F F, fastened to such seats by means of screws t, arranged as shown. In each valve-chest F there is a chamber, L, provided with two Valveseats, Zm, which open .into two lateral passages, a o, arranged in the chest, and communicates with the four passages zo 'u u o in the interior of the case A. Furthermore, there is in such chamber 7ta single valve, p, adapted to move from one to the other of the two valve-seats of such chamber, and suitably connected with a spindle, q, arranged ina stuing-box, r, and screwed into the neck s thereof, such spindle being furnished at its outer end with a hand-wheel, t. Thereis in the upper part of the valve-chamber la an induction-opening,l fw, the eduction-opening being shown at y in the lower end of the valvechamber loof the lower valve-chest. If, now, we suppose water, under a head or pressure, to be let into the valve-chamber of the upper valve-chest, and the valve of such chest to be against the seat Z, the seat m will be uncovered, and the water will rush through the passage o,- thence into the passage o; thence into the space between the head f and the` partition a; thence through the filtering me. dium and the partition a, and into the space between the head f and said partition, out of which space it will escape, by the passage a', into the passage a, and next through the valve-seat Z of the lower valve-chest; thence into the lowervalve-chamber, k, and out of its `eductionopening y, the valve p of such chest being against its seat m.

the valve-seat m, of the upper valve-chest, and the lower valve be forced forward against the valve-seat Z of the lower valvechest, the direc- Now, if i the upper valve be drawn backward against tion of movement of the water will be reversedthat is to say, the water will flow through the passage a into the passage u; thence into the space between the head f and the partition a thence through the iiltering medium, and into the space between the head f and the partition a' thence into the passage fv; thence into the passage o, chamber 7c, and

educt y; By closing the two valves on the seats Z Z or on the two seats on m,water will iow through the case A and the educt y without going through4 the filtering medium.

Ioo

valve p beingarranged across the ehamber k, 1o The filter-ease A, provided with the pasand adapted to alternately uncover or close sages u o a o', the Woven-wire partitions (c a, one of the seats by being moved transversely and the heads f f arranged as set forth7 and across the chamber, as set forth. 5 the valveehests F F, secured vto the caseA at i JOHN TOLAND.

I @lai mopposite ends, and each having` the two opposite seats Z m at opposite sides of the chamber Vitnesses: 7c, in combination with the solid reciprocating R. H. EDDY, valves 19 p and their Operating-stems q q, each E. B. PRATT. 

